Swiftのアプリ開発でハマったこと

XCode6 Beta でSwiftで開発したときにあったトラブルを紹介します

Transcript

1. Swift LT
   @Wantedly
   2014-07-17 yohei sugigami
   

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2. ਿ্༸ฏ εΪΨϛϤ΢ϔΠ
   
   (JU)VC!TVTJFZZ
   ઌ݄+0*/ͨ͠͹͔Γͷ৽ถϓϩάϥϚʔ
   !
   !
   !
   8BOUFEMZͰ͸ߴ͍2JJUBྗ͕ٻΊΒΕΔ
   
   SwiftͰ̎Ґ
   

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3. ɾSwiftͷΞϓϦ։ൃͰϋϚͬͨ
   
   ɹ͜ͱ ̍̌ݸ
   
   !
   ɾXcode6ͱSwiftͷΞϓϦ։ൃͰ
   
   ɹ౿Μͩ஍ཕͨͪ̔ݸ
   ΞδΣϯμ
   

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4. Xcode6Ͱ৽نͷΞϓϦΛ։ൃͨ࣌͠ʹؾ͍ͮͨ͜ͱ
   Λ·ͱΊ·͢ɻΞϓϦͷ࢓༷͸ҎԼͷͱ͓Γɻ
   
   !
   - ։ൃݴޠ͸Swift
   
   - CocoapodsͰطଘObjcͷϥΠϒϥϦΛར༻
   
   - σϓϩΠλʔήοτ͸iOS8Ҏ্
   
   - StoryboardΛར༻
   
   - AutolayoutͱSizeClassesΛར༻
   

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5. ։ൃ؀ڥ͸ҎԼͷͱ͓Γɻ
   
   !
   - Xcode6͸Beta2, 3Λར༻
   
   - ݕূ࣮ػ͸iOS8 Beta2, 3ΛΠϯετʔϧͷiPhone5
   
   !
   Beta2Ͱ։ൃ͍ͯͨ͠ΒɺBeta3͕ग़·ͨ͠ ʘ(^o^)ʗ
   

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6. SwiftͷΞϓϦ։ൃͰ
   ϋϚͬͨ͜ͱ
   

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7. ҎԼͷ༷ͳObjCϝιουʹSwiftͷ
   ΫϩʔδϟΛ౉͢ํ๏
   @interface HogeFuga : NSObject
   + (void) hogeUsingBlock:(id)bock;
   @end
   

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8. ObjC id = Swift AnyObject
   

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9. HogeFuga.hogeUsingBlock( { () -> () in
   println("Fuga")
   })
   ERROR Type '() -> ()' does not
   conform to protocol 'AnyObject'
   

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10. var closures: AnyObject = { () in
    println("Fuga")
    }
    ERROR Type '() -> ()' does not
    conform to protocol 'AnyObject'
    

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11. typedef void (^Block)();
    !
    @interface HogeFuga (Wrapper)
    + (void) hogeUsingBlockWrapper:(Block)block;
    @end
    !
    @implementation HogeFuga (Wrapper)
    + (void) hogeUsingBlockWrapper:(Block)block;
    {
    [HogeFuga hogeUsingBlock:block];
    }
    @end
    ObjCͰܕΛ໌ࣔͨ͠ϒϩοΫΛ
    
    ࣋ͭϝιουͰϥοϓ͢Δ
    

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12. NSObject#descriptionΛΦʔόʔϥ
    Πυ͢Δ
    ᶄ
    

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13. class Hoge: NSObject {
    var name: String?
    var note: String?
    override func description() -> String {
    return "Name = \(self.name),
    Note = \(self.note)"
    }
    }
    ERROR Method does not override
    any method from its superclass
    

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14. class Hoge: NSObject {
    var name: String?
    var note: String?
    override var description: String! {
    get {
    return "Name = \(self.name),
    Note = \(self.note)"
    }
    }
    }
    ϓϩύςΟͷΦʔόʔϥΠυ͢Δ
    

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15. ObjCͷenum஋ΛSwiftه๏Ͱهࡌ
    ͢Δํ๏͕Θ͔Βͳ͍
    ᶅ
    

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16. Swift
    UIViewAutoresizing.FlexibleLeftMargin
    typedef NS_OPTIONS(NSUInteger, UIViewAutoresizing) {
    UIViewAutoresizingNone = 0,
    UIViewAutoresizingFlexibleLeftMargin = 1 << 0,
    …
    }
    ObjC
    UIViewAutoresizingFlexibleLeftMargin
    Θ͔Γ΍͍͢ྫ
    

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17. Swift
    UIViewAnimationOptions.LayoutSubviews
    typedef NS_OPTIONS(NSUInteger, UIViewAnimationOptions) {
    UIViewAnimationOptionLayoutSubviews = 1 << 0,
    UIViewAnimationOptionAllowUserInteraction = 1 << 1,
    …
    }
    ObjC
    UIViewAnimationOptionLayoutSubviews
    ڐ༰ൣғͳྫ
    

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18. Swift
    HogeStyle.FugaValue1
    typedef NS_ENUM(NSInteger, HogeStyle) {
    HogeFugaDefault,
    HogeFugaValue1,
    HogeFugaValue2,
    HogeFugaSubtitle
    };
    ObjC
    HogeFugaValue1
    ෳࡶͳྫʢPrefix͕Ұக͍ͯ͠ͳ͍ʣ
    

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19. enumܕͷϝιουҾ਺΍ม਺ʹ
    enumͰఆٛ͞Εͨఆ਺Ҏ֎Λઃఆ
    ͢ΔͱΤϥʔʹͳΔ
    ᶆ
    

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20. typedef NS_ENUM(NSInteger, UIViewContentMode) {
    UIViewContentModeScaleToFill,
    ...
    }
    !
    self.view.contentMode = 0
    !
    // => ERROR Cannot convert the expression's type
    '()' to type 'UIViewContentMode'
    Swiftͷܕ͸ݫ͍͠Ͱ͢Ͷ
    

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21. εΧϥʔܕͷΩϟετ͸ίϯόʔ
    δϣϯΛ࢖͏
    ᶇ
    

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22. let i: Int = Int(1.0)
    let n: NSInteger = NSInteger(1.0)
    !
    let f: Float = Float(100)
    let d: Double = Double(100)
    let g: CGFloat = CGFloat(100)
    SwiftͰ͸εΧϥʔܕͷΩϟετ͸ͳ͍
    
    ୅ΘΓʹίϯόʔδϣϯΛར༻
    

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23. let index: NSInteger = 1
    let width: CGFloat = 100
    let r = width * (CGFloat)index
    !
    // => ERROR Consecutive statements on
    a line must be separated by ';'
    ObjCϥΠΫͳΩϟετ͸Ͱ͖ͳ͍
    

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24. let someObjects: [AnyObject] = [
    Movie(name: "2001: A Space", director: "Stan"),
    Movie(name: "Moon", director: "Duncan Jones"),
    Movie(name: "Alien", director: "Ridley Scott")
    ]
    !
    for object in someObjects {
    let movie = object as Movie // Type Casting !
    println("Movie: '\(movie.name)',
    dir. \(movie.director)")
    }
    ิ଍

    ΦϒδΣΫτܕ͸ΩϟετՄೳ
    

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25. for movie in someObjects as [Movie] {
    println("Movie: '\(movie.name)',
    dir. \(movie.director)")
    }
    ഑ྻΛΩϟετ͢ΔͱίϯύΫτʹॻ͚Δ
    

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26. CGFloatͱFloat·ͨ͸Doubleͷԋࢉ
    ᶈ
    

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27. import CoreGraphics
    !
    typealias CGFloat = Float
    CoreGraphicsʹ͸CGFloat͸FloatͱΤΠϦΞ
    ε͞Ε͍ͯΔ
    

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28. let index: NSInteger = 1
    let width: CGFloat = 100
    let r1 = width * Float(index)
    !
    // => ERROR Could not find an overload
    for '*' that accepts the supplied
    arguments
    CGFloatͱFloatͷԋࢉ
    
    Ұݟਖ਼͘͠ಈ࡞ͦ͠͏͕ͩΤϥʔʹͳΔ
    

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29. ͳͥͳΒ
    
    iPhone5s(arm64)ΛλʔήοτʹϏ
    ϧυ͍ͯ͠Δ͔Β
    

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30. ͜ͷͱ͖CGFloat͸SwiftͷDouble
    ʹΤΠϦΞε͞ΕΔ
    

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31. let index: NSInteger = 1
    let width: CGFloat = 100
    let r2 = width * Double(index)
    // => OK
    iPhone5s(arm64)ͷ৔߹͸Doubleͩͱίϯ
    ύΠϧͰ͖Δ
    

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32. let index: NSInteger = 1
    let width: CGFloat = 100
    let r = width * CGFloat(index)
    // => OK
    CGFloatͱͷԋࢉ͸CGFloatʹίϯόʔ
    δϣϯ͠·͠ΐ͏
    

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33. ObjCͷNSIntegerͱSwiftͷIntͷԋ
    ࢉ
    ᶉ
    

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34. typealias NSInteger = Int
    !
    !
    let i: Int = 1
    let n: NSInteger = 1
    let x: CGFloat = 3
    let y: Float = 3
    let w = i + Int(x) + Int(y) // => OK
    let q = n + Int(x) + Int(y) // => OK
    !
    if n == i {
    println("HERE!") // => OK
    }
    

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35. let u: NSUInteger = 1
    !
    // ERROR => Use of undeclared type
    'NSUInteger'; did you mean to use
    'Int'?
    NSUInteger ͸ར༻Ͱ͖·ͤΜ
    

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36. ΫϩʔδϟܕϓϩύςΟͷΦϓ
    γϣφϧͳॻ͖ํ
    ᶊ
    

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37. class Fuga {
    var completion: ( () -> () )?
    }
    ؙׅހͰׅΓ·͢
    

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38. ObjCͷClassܕΛύϥϝʔλʹͱΔ
    ϝιουʹSwiftͷClassΛ౉͢ํ๏
    ᶋ
    

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39. @interface RKObjectMapping : RKMapping {
    +(instancetype)mappingForClass:(Class)objectClass
    }
    !
    !
    @implementation RKObjectMappingOp…
    {
    return [mapping.objectClass new];
    }
    ౉ͨ͠Classܕ͕ObjCଆͰnew͞ΕΔέʔε
    
    ʢྫɿ Restkit)
    

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40. Swift͔ΒͲ͏͍͏ clazz Λ౉ͤ͹͍͍ͷ͔
    class HogeModel: NSObject {
    }
    !
    !
    var clazz = ???

    let mapping: RKObjectMapping =
    RKObjectMapping(forClass: clazz)
    

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41. var clazz: AnyClass =
    NSClassFromString(“WTDHogeModel”)
    !
    // ERROR => EXC_BAD_INSTRUNCTION
    ࣦഊᶃ
    
    NSClassFromStringͰ౉͢
    

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42. var clazz: AnyClass =
    object_getClass(WTDHogeModel())
    !
    !
    // newͰERROR
    [mapping.objectClass new];
    ࣦഊᶄ
    
    object_getClassͰ౉͢
    

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43. var clazz: NSObject.Type = WTDHogeModel.self

    let mapping: RKObjectMapping =
    RKObjectMapping(forClass: clazz)
    !
    !
    // ʹʼ OK
    ݁࿦
    
    NSObject.TypeΛ౉͢
    

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44. γϯάϧτϯύλʔϯΛ࣮૷͢Δ
    ̏ͭͷํ๏
    ᶌ
    

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45. !
    !
    ஗ԆॳظԽʢlazy initializationʣͱεϨου
    ηʔϑʢthread safetyʣ͕ߟྀ͞Ε࣮ͨ૷
    

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46. class Singleton {
    class var sharedInstance : Singleton {
    struct Static {
    static var onceToken : dispatch_once_t = 0
    static var instance : Singleton? = nil
    }
    dispatch_once(&Static.onceToken) {
    Static.instance = Singleton()
    }
    return Static.instance!
    }
    }
    dispatch_onceͰఆٛ
    ObjCͱಉ༷ͷ࣮૷ํ๏

    ຖճ͜ΕΛॻ͘ʹͷ͸େม
    

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47. let _SingletonSharedInstance = Singleton()
    !
    class Singleton {
    class var sharedInstance : Singleton {
    return _SingletonSharedInstance
    }
    }
    άϩʔόϧఆ਺Ͱఆٛ
    ࠓޙSwiftͷݴޠ࢓༷͕มߋ͞Εہॴతά
    ϩʔόϧม਺͕ఆٛͰ͖ΔΑ͏ʹͳΕ͹ɺ
    ͜ͷ࣮૷ํ๏͕΋ͬͱ΋γϯϓϧ
    

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48. class Singleton {
    class var sharedInstance : Singleton {
    struct Static {
    static let instance : Singleton = Singleton()
    }
    return Static.instance
    }
    }
    structͷstaticఆ਺Ͱఆٛ ʢਪ঑ʣ
    Swiftͷclass͸staticఆ਺Λར༻Ͱ͖ͳ͍ͷ
    ͰɺstructͰωετͯ͠staticఆ਺Λอ࣋
    

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49. Xcode6ͱSwift&iOS8
    ͷΞϓϦ։ൃͰ౿Μ
    ͩ஍ཕͨͪ
    

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50. ίϯύΠϧΤϥʔ
    
    XXXHeaderϑΝΠϧ has been
    modified since the precompiled header
    ᶃ
    

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51. fatal error: file ‘…/UIKit.framework/
    Headers /UIVisualEffectView.h’ has
    been modified since the precompiled
    header …
    

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52. ରԠํ๏
    
    ຖճͳ͔ͥͳ͓ΔରԠํ๏͕·ͪ·ͪ
    
    !
    - Xcode6࠶ىಈ
    
    - ϏϧυΛΫϦʔϯ͢Δ
    
    - DerivedDataΛ࡟আ͢Δ
    
    - OSXΛ࠶ىಈ͢Δ
    
    - Xcode6ΛೖΕͳ͓͢ orz
    

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53. ᶄ
    IBOutletͷStoryboardͱͷίωΫ
    γϣϯ͋Γ͕දࣔ͞Εͳ͍৔߹͕
    ͋Δ
    

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54. ίϯύΠϧޙͷΞϓϦͷڍಈ͸ਖ਼͘͠઀ଓ
    ͞Ε͍ͯΔঢ়ଶͰಈ࡞͍ͯ͠·ͨ͠
    

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55. ᶅ
    StoryboardͷϑΝΠϧΛ։͍ͯ΋
    XMLͰදࣔ͞ΕΔ
    

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56. XML…
    

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57. ໌ࣔతʹ։͖·͠ΐ͏
    

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58. ᶆ
    ιʔείʔυϋΠϥΠτͱೖྗิ
    ׬͕ޮ͔ͳ͘ͳΔ
    

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59. ͨ·ʹ෮׆΋͠·͆͢
    

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60. ᶇ
    γϛϡϨʔλʔͰΞϓϦΛىಈ͠
    Α͏ͱ͢ΔͱΤϥʔʹͳΔ
    

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61. Xcode6ͱγϛϡϨʔλʔΛ࠶ىಈ
    ͨ͠Βͳ͓Γ·ͨ͠ɻ
    

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62. ᶈ
    Xcode5ͱXcode6ͷγϛϡϨʔλʔ
    Ͱಉ࣌ʹΞϓϦΛىಈͰ͖ͳ͍
    

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63. ͲͪΒ͔ͷγϛϡϨʔλʔΛऴྃ
    ͠·͠ΐ͏
    

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64. ᶉ
    switchͱॻ͘ͱXcode͕ϑϦʔζ͢
    Δ
    

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65. Beta3Ͱ͸·ͩग़͍ͯͳ͍Ͱ͢
    

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66. ᶊ
    ޡͬͯϓϩδΣΫτΛXcode5Ͱ։
    ͍ͯStroyboardΛ։͘ͱXcode6Ͱ
    Stroyboard͕͓͔͘͠ͳ͍ͬͯΔ
    

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67. Xcode5Ͱޡͬͯ։͍ͨΒԿ΍ΒΤϥʔ͕
    ϑΝΠϧ͕ഁյ͞Ε·ͨ͠ɻ
    
    git reset ͳͲͰϑΝΠϧΛ໭͠·͠ΐ͏ɻ
    

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68. Finder͔ΒϓϩδΣΫτϑΝΠϧΛ
    μϒϧΫϦοΫͯ͠։͘ͱXcode5
    Ͱ։͔ΕΔ͜ͱ΋͋Γ·͢ɻ
    

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69. Xcode5Λىಈ͢ΔͱɺXcode6Ͱ࡞
    ۀ͍ͯͨ͠ϓϩδΣΫτΛউखʹ
    ։͘৔߹͕͋Γ·͢ɻ
    

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70. ༧๷ࡦ
    
    !
    ̍. gitͳͲͰࡉ͔͘ίϛοτͯ͠ϩʔϧόοΫͰ͖Δ
    Α͏ʹ
    
    !
    ̎. Xcode6ͰϓϩδΣΫτΛ։͍ͨΒετʔϦϘʔυ
    Λ࠷ऴฤूը໘ʹͯ͠ด͡ͳ͍
    
    !
    ̏. Xcode6Λऴྃ͢Δͱ͖͸ϓϩδΣΫτΛด͔ͯ͡
    Βऴྃ͢Δ
    
    !
    ̐. Xcode5ΛࣺͯΔ͆
    

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71. iOS,Android
    Rails ΤϯδχΞ
    ืूத
    hiring@wantedly.com
    ڵຯ͕͋Δํ͸ͪ͜Β͔Β͝࿈བྷ͍ͩ͘͞
    ৽͍ٕ͠ज़ʹͲΜͲΜ௅ઓ͍ͨ͠
    ϞόΠϧΤϯδχΞɾ΢Υϯςουʂʂ
    ͪ͜Β͔ΒͰ΋OKͰ͢
    

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72. ͓ΘΓ
    

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